Thermal Stability and Mechanical Properties of Plasma Sprayed Al2O3/ZrO2 Nano-Composite Coating

Satoshi Sodeoka; Masato Suzuki; Takahiro Inoue

doi:10.4028/www.scientific.net/KEM.317-318.513

Paper Titles

Laser Chemical Vapor Deposition of Thick Oxide Coatings
p.495

La₂O₃ Doped Y₂O₃ Stabilized ZrO₂ TBC Prepared by EB-PVD
p.501

Deposition Behavior of YSZ Nano-Coating Layer by EB-PVD
p.505

Thermal Conductivity of Nano-Pore Dispersed Y-PSZ Fabricated by EB-PVD
p.509

Thermal Stability and Mechanical Properties of Plasma Sprayed Al₂O₃/ZrO₂ Nano-Composite Coating
p.513

Investigation of Strontium-Niobium Oxides for Application to Thermal Barrier Coatings
p.517

Thermal Conductivity of Zirconia for Thermal Barrier Coatings: A Perturbed Molecular Dynamics Study
p.521

Mechanical Properties and Damage Durability of Thermal Barrier Coatings with Thermal Fatigue
p.525

Advances in YSZ Coatings Prepared by Sol-Gel Route. Applications to Fuel Cells or Thermal Barrier Coatings
p.529

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Thermal Stability and Mechanical Properties of Plasma Sprayed Al₂O₃/ZrO₂ Nano-Composite Coating

Abstract:

Alumina/zirconia nano-composite coating was fabricated by plasma spraying using agglomerated feedstock from fine powders of about 100 nm. The coating was consisted of fine γ-alumina and zirconia crystals with size of several nano meter and some amorphous boundary layers. The amorphous phase was crystallized and disappeared after heat treatment at 930°C. However, the crystallite size was kept under 50 nm even after 1500°C-100hr heating, so the alumina-zirconia nano-composite showed good thermal stability against the grain growth.